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13 Cards in this Set
- Front
- Back
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What's the correlation of dental caries with fluoride content in public water supply?
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As fluoride concentration increases, dental caries reduces through a sharp decline and plateaus around 1.5 ppm.
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How do fluoride supplements effect tooth morphology?
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Fissures are much deeper in non-fluoridated water compared to fluoridated-water areas. Shallow areas are less retentive to caries.
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Does topical fluoride effect teeth the same way that systemic fluoride does?
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As you increase fluoride concentration in drinking water, carious enamel areas reduces (study done in animals).
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What happens to demineralization when fluoride is incorporated into enamel
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Increasing amt of fluoride in enamel tooth surface will decrease the degree of demineralization (%) dramatically.
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What 2 processes occur simultaneously at surface of the tooth?
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Demineralization and remineralization. The higher the degree of saturation, the greater the rate of precipitation. Enamel dissolves, and another phase forms. As you increase F, increase DS(fluoroapatite).
(Experimental results) |
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How does concentration of CaF effect the acid produced by S. Mutans?
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Acid production rate in presence of CaF decreases under various pHs.
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Describe the contents of saliva
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1) mineral ions (enter and exit saliva and plaque fluid)
2) clearance products from plaque fluid into the saliva - substrates, metabolic end-products 3) urea, proteins, immune factors, and substrates all go into the bacteria |
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what are components of crevicular fluid that act on bacteria + plaque fluid?
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immune factors, proteins
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What experimental technique can be used to detect ions in plaque fluid?
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ion microscopy.
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Describe the relative amounts of acids in plaque fluid
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1) acetic acid most
2) propionic acid next 3) formic 4) small mts of lactic, succinic, butryic |
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What happens to pH following sucrose (carb) exposure in caries-free vs. previous caries vs. active caries
What happens to DS? |
1) CF- significant drop in pH immeditately followed by rise
2) CP - significant drop a slight increase later 3) CA - huge drop, continues to decrease over time Degree of saturation (DS) also decreases upon exposure to carbs in all groups CF, CP, and CA and follows same trends as above. |
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Why do we see a huge drop in pH after sucrose exposure?
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usually due to production of lactic acid in CF, CP, and CA.
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How does calcium concentration differ between caries free and caries positive pts?
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calcium concentratin higher in caries cree vs. CP patients
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